JPH09177365A - Attachment structure of steel plate damper in steel structure or steel reinforced concrete structure - Google Patents

Abstract

(57) [Abstract] [Issue] As a seismic control measure during an earthquake, R in columns and beams
C-shaped hanging wall and waist wall are joined with steel plate dampers, but steel plate dampers can be attached at the same time as steel frame construction without the need to construct anchor bars and base plates with formwork as in the past. And a steel plate damper attachment structure in which the shearing force acting on the steel plate damper is effectively transmitted to the RC wall. SOLUTION: Flat steel is directly attached to steel beams of upper and lower floors, gusset plates are welded to the flat steel, and steel plate dampers are attached between the upper and lower gusset plates during steel frame construction, and the flat steel and the gusset are attached. The plate will be embedded in the RC hanging wall and waist wall.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION A steel plate damper (a steel plate damper having a honeycomb shape), which is one of the seismic control devices, is attached to a steel frame structure (hereinafter referred to as S structure) or a steel frame reinforced concrete structure (hereinafter referred to as SRC structure) structure. Related to the structure.

[0002]

2. Description of the Related Art In a frame structure composed of columns and beams, a rectangular mild steel plate has a honeycomb shape in a lateral direction in order to absorb vibration energy at the time of an earthquake and obtain a damping effect. It is often practiced to install a steel plate honeycomb damper having a plurality of openings between the hanging wall and the waist wall. When the honeycomb damper receives a shearing force during an earthquake, the honeycomb damper undergoes elastic-plastic deformation and can absorb vibration energy.

In the case of attaching a steel plate damper to a conventional SRC structure, a RC hanging wall is provided from the SRC beam on the upper floor, and a waist wall made of RC is installed from the SRC beam on the lower floor. The base plate is fixed to the hanging wall and the waist wall by anchor bars, gusset plates are welded to the base plates, and a steel plate damper is attached between the two gusset plates.

Therefore, the last step is to attach the steel plate damper, and at the stage of constructing the RC-made hanging wall and waist wall, it was necessary to install the anchor bars and the base plate to provide the formwork. Generally, anchor muscles, pace plates, etc. are heavy and difficult work.

Therefore, by attaching the flat steel for directly attaching the steel plate damper to the steel beams of the upper floor and the lower floor, the steel plate damper can be attached at the same time as the steel frame work, and the steel plate damper acts efficiently. An object of the present invention is to provide a structure for transmitting shearing force to RC hanging walls and waist walls.

[0006]

[Means for Solving the Problems] This is a structure for attaching a steel plate damper in a steel frame structure or a steel frame reinforced concrete structure, in which flat steel is fixed to a steel beam of the upper floor, and a gusset plate is attached to the tip of the flat steel. Welding, the flat steel and gusset plate are embedded to provide a hanging wall, the flat steel is fixed to the steel beam of the lower floor, the gusset plate is welded to the tip of the flat steel, and the flat steel and the gusset plate are In a structure of steel frame or steel-framed reinforced concrete structure, wherein a waist wall is embedded and a steel plate damper is attached between the gusset plate from the upper floor and the gusset plate from the lower floor. The main purpose is to attach a steel plate damper.

[0007] Two flat steels are suspended from an S-beam or an SCR-enclosed steel beam on the upper floor, and a gusset plate for attaching a steel plate damper is welded to the tip of the flat steel. Similarly, two flat steel bars are fixed and erected on the beam on the lower floor, and gusset plates are welded to the ends of the flat steel bars. The upper and lower gusset plates are joined together with a steel plate damper.

With such a structure, the steel plate damper can be attached at the time of steel frame construction.

Further, since the gusset plate for attaching the steel plate damper is directly anchored to the beam, members such as a base plate and an anchor streak which have been conventionally required are unnecessary.

Therefore, it is possible to be freed from the difficult work of handling heavy objects.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described below with reference to the drawings.

FIG. 1 is an elevational view of a steel plate damper attachment structure frame of the present invention.

In the frame structure of the pillar 1 and the beam 2 made of SRC, S
The flat steels 3 and 3 are hung from the beam 2a on the upper floor of the S structure and erected from the beam 2a on the lower floor, which is included in the RC structure.
Weld the gusset plates 4 and 4 to their ends
Is welded, and the steel plate damper 5 is attached between the gusset plates 4 and 4.

FIG. 2 is an S-shaped beam 2 in which an L-shaped steel 6 is welded to a S-shaped beam 2a and a flat steel 3 is bolted to the S-shaped beam 2a in the section AA of FIG.
It is a figure which shows the accommodation of a and flat steel 3.

FIG. 3 is a detailed view of portion B in FIG.
It is the figure which welded the gusset plates 4 and 4 to the edge part of 3, and joined the gusset plates 4 and 4 comrade with the steel plate damper 5.

The shearing force generated in the steel plate damper 5 is transmitted to the RC-made hanging wall 8 and the waist wall 9 by the shear key plate 7 welded to the gusset plates 4 and 4. The shear key plate 7 may be replaced with a stud or the like.

FIG. 4 is a diagram showing an example in which the flat steels 3 are arranged in a V shape. By arranging the flat steel 3 in the inverted C-shape, the steel plate damper 5 can be accommodated as much as the flat steel is inclined.
The flat steel 3 can bear the shearing force acting on the steel sheet as a partial axial force. Therefore, the number of wall reinforcements is smaller than that of the conventional structure. In this case, the flat steel 3 may be buckled, but RC
The walls of the wall play a role in resisting buckling.

FIG. 5 is a sectional view taken along line CC of FIG.
FIG. 4 is a view showing that the flat steel 3 is housed and the hanging wall 8 and the waist wall 9 are located at the center of the beam 2. Since the flat steel 3 can be directly bolted to the S-shaped beam 2a through the L-shaped steel or the like, the RC sagging wall 8 and the waist wall 9 are biased within the width of the SRC-shaped beam. Good.

FIG. 6 is a view showing an example in which the flat steel 3 is arranged in a V shape on the S-shaped beam 2a, and the hanging wall 8 and the waist wall 9 can be replaced by a precast plate 10. in this case,
Pre-cast plate 10 with flat steel 3 and gusset plate 4 in advance
Can be embedded and the S-shaped beam 2a and the flat steel 3 can be directly welded to each other, or can be anchored by any conventional method of attaching the precast plate 10.

[0020]

The gusset plate for attaching the steel plate damper is made of flat steel, and when the flat steel is directly anchored to the S-shaped beam and the flat steel is welded in parallel, it is made of a shear key plate or the like.
The shearing force acting on the steel plate damper is effectively transmitted to the RC wall. When the flat steel is attached in a V shape, since the flat steel is inclined obliquely, a part of the shearing force acting on the steel plate damper is transmitted to the RC wall as the axial force of the flat steel, and the RC wall resists the buckling. Effective for resistance.

Further, according to the structure of the present invention, the steel plate damper is attached at the same time as the steel frame work, and the heavy metal work such as the anchor bar or the base plate and the formwork for wrapping the same as in the conventional case are not necessary, and the construction is simple. Be converted.

[Brief description of the drawings]

FIG. 1 is an elevation view of a steel plate damper attachment structure frame of the present invention.

FIG. 2 is a view showing a fit between an S-shaped beam and a flat steel, in which an L-shaped steel is welded to the S-shaped beam and the flat steel is bolted together in the AA cross section of FIG. 1.

FIG. 3 is a detailed view of a portion B in FIG. 1, showing a gusset plate welded to an end of flat steel and joining the gusset plates with a steel plate damper.

FIG. 4 is a diagram showing an example in which flat steels are arranged in a V shape.

FIG. 5 is a cross-sectional view taken along line CC of FIG. 4, showing the accommodation of the beam and the flat steel, and the case where the hanging wall and the waist wall are located at the center of the beam.

FIG. 6 is a diagram showing an example in which flat steel is arranged in a V shape on an S-shaped beam.

[Explanation of symbols]

1 ... Pillar, 2 ... Beam, 2a ... S-shaped beam, 3 ...
・ Flat steel, 4 ... Gusset plate, 5 ... Steel plate damper, 6 ... L-shaped steel, 7 ... Shear key plate,
8 ... Hanging wall, 9 ... Waist wall, 10 ... Precast board

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akihiro Kunimatsu 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Within Kashima Construction Co., Ltd. (72) Inventor Takashi Ishizuchi 1-3-3 Awaza, Nishi-ku, Osaka City, Osaka Prefecture No.15 Kashima Construction Co., Ltd.Kansai Branch

Claims (1)

[Claims] 1. A structure for attaching a steel plate damper in a steel frame structure or a steel frame reinforced concrete structure, wherein flat steel is fixed to a steel beam on the upper floor, and a gusset plate is welded to the tip of the flat steel. The flat steel and the gusset plate are embedded to form a hanging wall, the flat steel is fixed to the steel beam on the lower floor, the gusset plate is welded to the tip of the flat steel, and the flat steel and the gusset plate are embedded to lower the waist. A wall is provided, and a steel plate damper is attached between the gusset plate from the upper floor and the gusset plate from the lower floor, and the installation of the steel plate damper in a steel frame or steel reinforced concrete structure Wearing structure.